package org.apache.maven.repository.metadata;

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

import org.apache.maven.artifact.ArtifactScopeEnum;
import org.codehaus.plexus.PlexusContainer;
import org.codehaus.plexus.component.repository.exception.ComponentLookupException;

/**
 * This object is tinted with ClasspathTransformation and GraphConflictResolver. Get rid of them
 * after debugging
 *
 * @author <a href="oleg@codehaus.org">Oleg Gusakov</a>
 */
public class MetadataResolutionResult {
  MetadataTreeNode treeRoot;

  /**
   * these components are are initialized on demand by explicit call of the initTreeProcessing()
   */
  ClasspathTransformation classpathTransformation;
  GraphConflictResolver conflictResolver;

  // ----------------------------------------------------------------------------
  public MetadataResolutionResult() {
  }

  // ----------------------------------------------------------------------------
  public MetadataResolutionResult(MetadataTreeNode root) {
    this.treeRoot = root;
  }

  // ----------------------------------------------------------------------------
  public MetadataTreeNode getTree() {
    return treeRoot;
  }

  // ----------------------------------------------------------------------------
  public void setTree(MetadataTreeNode root) {
    this.treeRoot = root;
  }

  public void initTreeProcessing(PlexusContainer plexus) throws ComponentLookupException {
    classpathTransformation = plexus.lookup(ClasspathTransformation.class);
    conflictResolver = plexus.lookup(GraphConflictResolver.class);
  }

  // ----------------------------------------------------------------------------
  public MetadataGraph getGraph() throws MetadataResolutionException {
    return treeRoot == null ? null : new MetadataGraph(treeRoot);
  }

  // ----------------------------------------------------------------------------
  public MetadataGraph getGraph(ArtifactScopeEnum scope)
      throws MetadataResolutionException, GraphConflictResolutionException {
    if (treeRoot == null) {
      return null;
    }

    if (conflictResolver == null) {
      return null;
    }

    return conflictResolver.resolveConflicts(getGraph(), scope);
  }

  // ----------------------------------------------------------------------------
  public MetadataGraph getGraph(MetadataResolutionRequestTypeEnum requestType)
      throws MetadataResolutionException, GraphConflictResolutionException {
    if (requestType == null) {
      return null;
    }

    if (treeRoot == null) {
      return null;
    }

    if (conflictResolver == null) {
      return null;
    }

    if (requestType.equals(MetadataResolutionRequestTypeEnum.classpathCompile)) {
      return conflictResolver.resolveConflicts(getGraph(), ArtifactScopeEnum.compile);
    } else if (requestType.equals(MetadataResolutionRequestTypeEnum.classpathRuntime)) {
      return conflictResolver.resolveConflicts(getGraph(), ArtifactScopeEnum.runtime);
    } else if (requestType.equals(MetadataResolutionRequestTypeEnum.classpathRuntime)) {
      return conflictResolver.resolveConflicts(getGraph(), ArtifactScopeEnum.test);
    } else if (requestType.equals(MetadataResolutionRequestTypeEnum.classpathRuntime)) {
      return conflictResolver.resolveConflicts(getGraph(), ArtifactScopeEnum.test);
    } else if (requestType.equals(MetadataResolutionRequestTypeEnum.graph)) {
      return getGraph();
    } else if (requestType.equals(MetadataResolutionRequestTypeEnum.versionedGraph)) {
      return new MetadataGraph(getTree(), true, false);
    } else if (requestType.equals(MetadataResolutionRequestTypeEnum.scopedGraph)) {
      return new MetadataGraph(getTree(), true, true);
    }
    return null;
  }

  // ----------------------------------------------------------------------------
  public ClasspathContainer getClasspath(ArtifactScopeEnum scope)
      throws MetadataGraphTransformationException, MetadataResolutionException {
    if (classpathTransformation == null) {
      return null;
    }

    MetadataGraph dirtyGraph = getGraph();
    if (dirtyGraph == null) {
      return null;
    }

    return classpathTransformation.transform(dirtyGraph, scope, false);
  }

  // ----------------------------------------------------------------------------
  public MetadataTreeNode getClasspathTree(ArtifactScopeEnum scope)
      throws MetadataGraphTransformationException, MetadataResolutionException {
    ClasspathContainer cpc = getClasspath(scope);
    if (cpc == null) {
      return null;
    }

    return cpc.getClasspathAsTree();
  }
  // ----------------------------------------------------------------------------
  // ----------------------------------------------------------------------------
}
